Centering-gage.



I A. E. BONNEY.

CENTERING GAGE. APPLICATION FILED FEB. 20. I918.

Patented Oct. 1, 1918.

2 SHEETS--SHEET I.

m: Nonm's PETERS c0. PHOTOLITHO" WASMINCTUN. a. c,

' A. E. BONNEY.

CENTERING GAGE. APPLICATION FILED FEB. 20, 1918.

1,280,379, Patented Oct. 1, 1918.

2 SHEETSSHET 2.

fj 74 y 26 5W AEBOIZIZQ ALBERT n. nonnnr, or MILWAUKIE, onneon.

CENTERING-GAGE.

Specification of Letters Patent.

Patented 066.1, 1918.

Application filed February 20, 1918. Serial No. 218,316.

TocZZ whom it may concern:

7 Be it known that I, ALBERT E. BoNNEY, a citizen of the United States, residing at Milwaukie, in the county of Olackamas and State of Oregon, have invented new and useful Improvements in Centering-Gages, of which the following is a specification.

This invention has reference to a center ing device for lathe-works shafting, etc., and aims to produce a device of this character whereby the center of a shaft may be easily, quickly, and accurately determined and marked.

In carrying'out my invention I propose to produce a shaft centering gage having parallel gaging jaws provided with means for co incidentally advancing the same toward a centerin tool, that is spring in fiuenced, and which is adapted to have its point forced against the end of the shaft engaged by the jaws, when said tool is subjected to an impact of force, whereby to markthe shaft at the center thereof.

v The invention furtherconsists of the features of, the construction combination and arrangement of parts, hereinafter fully deonthe 1ine3-3 of Fig. 1.

Fig. 4 is a sectional view on the line 4- 1 of Fig.1. m a V .Fig. 5 is a sectional view approximately on the line 5-5 of Fig. 2. i V Fig. 6 is a sectional view approximately on the line 6 6 of Fig. l.

, Fig. 7 is a longitudinal sectional view apapproximately proximately on the line 7.7 of Fig. 1.

A Fig. 8 is a detailsectional view illustrating a slight modification.

a The improvement includes a substantially rectangular frame. The end plates for the frame are indicated by, thenumeral 10 and have openings through which pass-the reduced threaded ends 12 of spaced rods 13, the said rods providing the side members of the frame. The threaded ends 12 are engaged by nuts 14 which contact with the 10. In Fig. 8 of the. drawings the rods 13 do not have their ends reduced, but have arranged thereon suitable sleeves which contact with the inner or confronting faces of the plates 10.

The plates 10 are each centrally provided with alining round openings 15 receiving the reduced ends 16 and 17 respectively of a screw 18. The end 16 of the screw is pro vided with an annular depression 19 designed to receive the end of a pin 20 which is wedged or screwed in a suitable opening 21 in one of the plates 10', and whereby the shaft is permitted rotary movement but is prevented from movement in a longitudinal direction, so that the shoulders provided between the screw and the reduced ends 16 and 17 thereof need not contact with the end members 10 of the frame, and whereby unnecessary friction is overcome. The end member is bent upon itself to provide a cragk handle 22 whereby the screw is operate The threads on the screw 18, from the centerthereof arepitched in opposite directions, so that the said screw is provided with right and left hand threads.

The centering tool block is indicated by the numeral 23. This block comprises a substantially rectangular member and is provided with a central transverse opening 24 and with transverse openings 25 arranged adjacent to the ends of the block. The central opening receives the screw 18 and the end openin s 25 the rods lS, The block is loose upon oth the screw and the rods, but

is retained in proper position through the medium of headed threadedjmembers 26 engaging in threaded openings 27 and conta'cting with the rods 13. The block, between one of the rods 13 and the screw 18 is oprovided with a centrally arranged opening or socket 28, the said opening, upon the lower or active face of the block being surrounded by a depression 29.

The centering tool is indicated by the numeral 30 and has its round shank passing through the opening'28,the lower or outer end of the said tool being enlarged or provided with a flange or collar 31 that is received in the depression 29 and rests on the shoulder provided between the depression and the opening 28. The active face of the centering tool is pointed, as at 32. To normally retain the flange or collar 31 on the shoulder providing the wall oi depression 29, the shank of the tool, adjacent l. the outer end thereofr is provided with a transverse opening 33 within which is an ranged one end of a helical spring gh wh ich spring surrounds the shank of the tool and has {its opposite. .end resting upon the; upper face of the block 23.

The jaws for the device"are-indioated by "pitched at' difieren't angles to. co engagewith the respective right and left hand'threads on the "screw.

The jaws; are supported on-the blocks 36 by hollow members in the nature of sleeves 37L Thesleeves for the ,respectiveibloclgs are of different lengthspwhereby one; ofthe aws is elevated above'the other jawand may slide ov t l we j whe the b k 36. a influenced by the screw to bring the same toward each other. Passing-throughsuitb e Open gs i t r spe ve ja f. n e tering threaded openings ingthe', respective blocks, are screw inembers 38 whichhpldthe j aws on the sleeves and the I sleeves on the blocks' i a f 'e o 0 mayb P TQPQIU himed w t respect to the aws, by factuatingscrew b ipg, h i wst ward eaqhqt n nd th jfollower' blockspf the j aws into contact with the opposite sides of the tool carrying blo'ck,

. the block 36 will he p'rcperly .Piifiifiioned'pn the frame to; arrange; the centering tool j diommun at n with l sdf 1 w h th openings through ,w h i chthe rods 13 pass through the block and, threaded members,

s ch sse tive eh a j hese .dp' h ngs an fnictionallylcontact with the rods 13 tQ h ld th blo k in; PIT PB posi w Qnth i ram It is believed that 'the simplicity tof the con r ct q ah iit syp retion .9 the idevice Cppies pi: this patent they be; obtained for wi ll i ahparnt Without aif.urth rv de description. V

Havingthus described the invention, what I claim'is:

v 1., A centering device comprising a substantially rectangular frame having a longi- ,tudinally arranged screw journaled in the ends thereof and said screw having one of its ends provided with a handle, the screw, from the center thereof having itsthreads oppo- 5 sitely pitched, a block foirf-thc 5 side meiiibers of the'frame andon the*screw; a -fcentering toolcarriedhy'the blockandhaving spring means for normally tretaining the same' in one position, means 5 for I binding the block against the sidemembers of the frame; centeringjaws each comprisinga fflat plate-havin-g its inner edge notched, a -hldck for-each of the plates guided ion the sides ofthedframe and having threaded openings-receiving the oppositely pitched threads of :'-the -screw, sleeves of different lengths on the respective blocks, and elements passing through the jaws'and sleeveslfor securing the" jaws to the blocks andeelevating one off the jaws'above theother'jaw. v

*2. In a device :forthe purposeset -forth, a frame made up of end pieces and parallel rods removably connected to saidend pieces,

a screw having reduced endsj-journaledin the end pieces, one ofsaidends having acircumferential; groove, an element carried 7 by 'one of the end" pieces entering 't11e -grooire,'jthe other end of the screw heing=- cranked, said screw from the centerthereof having its threads pitched inopposite directions ahtool block slidablyarrangedion-the rods and re- 7 ceiving the screw; a s ring influenced centering 2 tool movable through the tool eblock,

n'deans" for securing the to ol block en the rods,

follower blocks, guided on the rods-and -jengagedt hy-i "the screw whereby to simultaneoiisly move sai'd follovver hloclgs toward or awayirom each ether-when "t1ie-;screw -is turhed; apla-te comprisingag w re: each 015100 the blocks, sleeves of di-fierent; lengths, between thefollowerflbloeksfiand therespective jaws, securing meansl'between' said j awe and the respective follower blacks; whereby-zone of said jaws is elevatedi-above the otheri ja-w,

' and "the jaws} atthe. warrantin ertds thereof havingeV-ishapgid notches.-

In testimony whereof}: mysignature.

' hma jzla'r ngsoimnv.

five centseaeh; byaddressing-the commissibneniofi Patents, WashingtomDw. I a 

